Chapter 6, Problem 6.2P

Interpretation Introduction

Interpretation:

Whether the internal energy of the body is increased or not after exercising is to be explained.

Concept introduction:

Heat $\left(q\right)$ is the energy transferred as a consequence of the difference of the temperature between the system and surrounding.

Work $\left(w\right)$ is the energy needed to move an object in the opposite direction of the force applied.

The internal energy of a process is the summation of the kinetic energy and potential energy associated with the process. In the case of a reaction, the change in internal energy $\left(\Delta E\right)$ is the difference in the energy of the product and reactant.

The work done by the system and heat released by the system is negative and the work done on the system and heat taken by the system is positive.